09-02-2012, 09:30 AM
(This post was last modified: 09-02-2012, 09:40 AM by Sunset Machine.)
When threading to a shoulder next time, try running the spindle in reverse with the tool on the backside of the work. There's usually enough slop in the gear train to manually put that cutter tip exactly where you want it with the power off, then turn it on. Works great, even with a threaded spindle nose if the threads are a fine pitch (like, 10 tpi?). Maybe rig up an all-thread chuck binder through the spindle bore to keep things screwed on. A word caution: all this forwarding/reversing can get a guy to hit the wrong direction and instantly crash. Don't do that.
Yup, picking up a thread. All your settings are gone, you're in uncharted waters and will need to find and set a new zero for the cross feed. The second time will be a lot easier.
If the trailing side is rough, and remembering how to pick up a thread, you'll see that you can retract the compound to clear, and feed the cross slide a couple thou past zero. Start threading again and you'll be shaving the trailing side this time. Ditto on cleaning up the leading side, feed the cross slide a couple thou short of zero. The process goes pretty quick, larger feeds of the compound can be used. The technique is also handy for large threads, working the sides like that.
Yup, picking up a thread. All your settings are gone, you're in uncharted waters and will need to find and set a new zero for the cross feed. The second time will be a lot easier.
If the trailing side is rough, and remembering how to pick up a thread, you'll see that you can retract the compound to clear, and feed the cross slide a couple thou past zero. Start threading again and you'll be shaving the trailing side this time. Ditto on cleaning up the leading side, feed the cross slide a couple thou short of zero. The process goes pretty quick, larger feeds of the compound can be used. The technique is also handy for large threads, working the sides like that.